Sunspot drawing of 1964-9-4

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https://doi.org/10.7891/e-manuscripta-94124



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1964-09-04
07:45
Hs 1304.5:2388
https://doi.org/10.7891/e-manuscripta-94124
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group